Bookkeeping machine



BOOKKEEPING MACHINE Filed Aug. 24, 1938 ll Sheets-Sheet l F/g. i

INVENTOR. Mi

ATTORNHS.

Oct. 23, 1945.

K. AURBACH 2,387,554

INVENTOR.

ATTORNEYS.

.Oct. 23, 1945. K. AURBACH BOOKKEEPING MACHINE 11 Sheets-Sheet 3 Filed Aug. 24, 1938 I NV EN TOR. Kw; 7644', m

ATTORNZYS.

Oct. 23, 1945. K. AURBACH BOOKKEEPING MACHINE Filed Aug. 24, 1938 ll Sheets-Sheet 5 INVENT OR. w? M4 14M ATTORNEYS.

0d. 23, 1945. K, AURBACH 2,387,554

BOOKKEEPING MACHINE Filed Aug. 24, 1938 ll Sheets-Sheet 6 F/lg. 6.

Oct, 23, 1945 K. AURBACH 2,387,554

BOOKKEEPING MACHINE Filed Aug. 24, 1938 ll Shee'tsSheet 7 ATTORNEYS.

Oct. 23, 1945. AURBACH 2,387,554

BOOKKEEPING MACHINE Filed Aug. 24, 1938 11 Sheets-Sheet 8 Oct. 23, 1945. K. AURBACH BOOKKEEPING MACHINE Filed Aug. 24, 1938 ll Sheets-Sheet 9 Patented Oct. 23, 1945 BOOKKEEPIN G MACHINE Kurt Aurbach, Bleleield, Germany; vested in the Allen Property Custodian Application August 24, 1938. Serial No. 226,468 In Germany August 27, 1937 10 Claims.

The invention relates to improvements in bookkeeping machines and is primarily concerned with machines having two balance mechanisms upon which double entry accounts can be computed. Double entry bookkeeping operations may comprise a sequence of steps consisting in entering old balances of an account and a contraaccount, posting the debits and credits of the account and the contra-account, and taking the new balances of the account and the contraaccount.

According to the present invention the bookkeeping machine is so constructed that under the control of setting means it is possible to carry out bookkeeping sequences consisting of a varying number of operations on one and the same machine. More specifically, the machine can be operated to carry out a sequence in which the old balance, the debits and credits, and the new balance of a single account are entered; or a sequence in which the old balance, the debits and credits, and the new balance of both an account and a contra-account are entered, the postin of the debits and credits to both the account and the contra-account being executed in a single machine operation.

In accordance with another feature of the invention in making entries of the old balance, debits and credits, and new balance in a single account, only a single setting means for the debits and credits is set, while for sequences in which the old balance, the debits and credits, and the new balance are entered in both an account and a contra-account, a plurality of setting means for the debits and credits may be set for a single machine operation.

In accordance with another feature of the invention all the blocking devices are mounted in a special carriage, and can be set into the machine as a unit, occupying the same space behind the special keys which the totalizers ccupy behind the amount keys.

While the improvements, which are now to be described in detail with reference to one illustrative embodiment of the invention shown in the drawings, were developed as a part of a bookkeeping machine for double-entry accounting, they are not all restricted to such machines.

The setting and blocking mechanism shown in the drawings of this application is part of a machine whose printing mechanism is shown in my copending application Serial No. 226,467, to which reference is made for a more complete disclosure of those parts of the machine.

Figs. 1 and 1a. are two parts of a developed front elevation of the special keyboard and part of its blocking mechanism;

Fig. 2 is a vertical section through the special keyboard on the line 2-2 of Fig. 1;

Fig. 3 is a similar vertical section on the line 3-3 of Fig. 1, showing a portion of the blocking unit;

Fig. 4 is a vertical section similar to Fig. 3 on the line 4-4 of Fig. 1;

Figs. 5a and 5b are two parts of a laterally expanded perspective view of the blocking mechanism unit;

Fig. 5c is a side elevation of a part of the blocking mechanism;

Figs. 6-8 are, respectively, vertical sections on the lines 6-6, 1-1, 8-8, of Fig. 1, each showing a portion of the blocking mechanism unit;

Figs. 9 and 10 are, respectively, vertical sections on the lines 9-9 and ill-l0 of Fig. In;

Fig. 11 is a vertical section on the line li-il of Fig. la, showing a portion of the blocking mechanism unit;

Fig. 12 shows the controlling and engaging mechanisms for one set of totalizers;

Fig. 13 is a sectional view of the adjusting mechanism for the tctalizers;

Fig. 14 is a sectional view of the engaging mechanism for one of balance mechanisms;

Fig. 15 is a side view, with parts in section, of a portion of the mechanism shown in Fig. 14;

Fig. 16 is a sectional view of the adjusting I mechanism for the balance mechanism;

Fig. 1''! is a sectional view of a portion of the mechanism shown in Fig. 16;

Fig. 18 is a cross section through the whole mechanism and shows the differential actuating mechanism for the key bank and totalizer mechanisms A-H and balance mechanisms I, 11.

The machine has two balance mechanisms I and II (Figs. 14, 16 and 18).; also eight totalizers E for the old balance postings, namely, two for each of the old debit balances and the old credit balances, corresponding respectively to the balance mechanisms I and II, and a similar group for entries in the account and contra-account, composed of two each for the old debit balance and the old credit balance, corresponding, respectively, to the balance mechanisms I and II. There are, in addition, 22 totalizers A, B for the debit posting, 22 totalizers C, D for the credit postings, a collective totalizer F for all debit and credit postings together, a totalizer G for cancellations and a totalizer H for corrective entries.

The selection of these totalizers and balance mechanisms is performed by keys, which are arranged in key banks i-l, as shown in Figs. 1 and 1a. The balance mechanisms I and II are selected for engagement with a differential mechanism 2i (Figs. 14 and 18) by the keys 8, 9, i0, ii of bank 6 (Figs. 6, '7. and 8) and keys l2, I3 of bank The totalizers E for the old balance entries, the totalizers G and H for the cancellations and corrective entries, and the collective totalizer F for all debit and credit postings are selected for engagement with the differential mechanism by the keys i l-24 in bank 5 (Fig. 13). The selection of the 44 totalizers A, B, C. D for the debit and credit postings is performed by keys 25-28 in banks I-fi (Fig, 13). The keys 8, 9, l0 and i I also set the machine for operating the balance mechanisms either additively or subtractively, the keys I2 and I3 (Figs. 9-11) set the machine for resetting the balance mechanisms I and II, the key 29 sets the machine for taking a sub-total from the totalizers of the banks l-5, and the key 30 sets the machine for resetting the totalizers of the banks I-5.

The totalizer mechanism, shown in Fig. 18, is the same as that described in Jacob Patent No. 2,029,776. In this application the same reference numerals with a prime mark are used for corresponding parts. Each group of totalizers comprises a series of storage members, in the form of rack bars 4' and a series of pinions l3 rotatably mounted on shafts.i2' supported on the side walls 3'. The rack bars 6' are supported on a stationary frame i in a way which permits horizontal sliding movement as well as tiltin movement in a vertical plane. For this purpose the rack bars are guided by rods 1 passing through slots 6' in the rack bars. The rack bars 6' are arranged in the usual way, with the bars of the same denomination of all the totalizers of the group side by side. The pinions it are sufficiently broad to engage all the rack bars of one denomination of one entire group. The rack bars l have at their left ends 8' two series of teeth on their upper and lower edges respectively. The upper set of teeth is for engagement with a tongue ii on a stationary tie bar i0, while the lower set of teeth is for engagement with the pinion i3. The rack bars can be tilted about the rods 7' to shift them from engagement with the locking bars ill to the pinions t3, and vice versa. The shifting is accomplished by means of vertical bars i l swung on arms l8, l9, pivotally supported on rods 80' carried on the side walls 3'. Thebars I l are shifted up and down by a cam mechanism fully disclosed in the said Jacob patent and which will not be described in detail here. Arrangement is made to tilt simultaneously, by means of the bars i i, the individual rack bars l of each denomination which constitute one totalizer. For this purpose there is mounted on the bottom of the frame i a slide 3i, which can be shifted longitudinally 0n the frame i' by a mechanism to be described presently. At the face of the slide 3i toward the front of the machine is fixed a plate 68 which has notches spaced at the proper intervals to let down the rack bars ii of each denomination of a single totalizer. At the front of the plates 68' is a plate 69' mounted so as to have a short vertical movement. The plate 59' has a horizontal slot through which the rack bars (3' extend and on the upper portion l3 above ing teeth. The plates 89' are positioned between lugs l5, it, on bars 14', and are thus shifted up and down by movement of these bars. The relation of the horizontal slot in bar 69' to the upper edge of plate 68' is such that when the plate 69' is in its upper position the rack bars ii are all held at the level of the top of plate 68', while in the lower position of plate 69' those rack bars d which are above the notches in plate 68' are permitted to drop into these notches. The action is made positive by the teeth on the upper part iii of the plate 69. The longitu dinal movement of slide 3! enables the notches in bar 68' and teeth on bar 69' to be brought into registry with any desired set of rack bars 6' constituting one totalizer of the group. The other rack bars are held up into engagement with Elsie locking bars It by the upper edge of plate Rotatably but non-shiftably mounted on the slides 3! are shafts 29'. These shafts have fixed upon them, at intervals corresponding to the denominational spacing of the totalizer rack bars, arms 30'. The arms on one shaft 29' are adapted to be positioned by the longitudinal movement of slide 3! opposite the ends of the rack bars 4' constituting one totalizer. Mechanism is provided to swing the arms 30' to the left to move the rack bars 4' constituting the selected totalizer to the extreme left position represented by the rack bars of the groups B and D in Fig. 18. Each shaft 29' has fixed to it a broad pinion 31' which meshes with teeth 38' on a bar 39' guided for vertical movement by a rod 4! engaging in a slot 68' of the bar, and by a lever 35 pivoted at M to the side wall 3 and articulated by a pin 63' to thelower end of the bar 39'. The lever d5 carries a roller M9" adapted to engage a cam groove (not shown) in a cam wheel illl' fixed on main shaft 98.

Each shaft l2 carrying pinions i3 is mounted in a carriage 2% (Fig. 12) guided for horizontal sliding movement in slots 26a in the side walls 3'. The carriages 26' can be moved by mechanism to be described presently to bring gears M fixed to pinions it into engagement with teeth 26 of differential rack bars 2!. The teeth ill on the opposite side of rack bars 2! mesh with segments H8 mounted on a shaft H9 and differentially controlled by keys H911.

A brief description of the operation of the totalizers by the differential mechanism will now be given, but for a full description reference is made to the said Jacob patent.

In the position of rest of the machine the rack bars t are in various positions corresponding to the totals which they represent and are engaged with the locking bars ill, the plates 69' being in their upper positions. The carriages 25 are in their right end positions and gears I8 are out of mesh with the teeth 26'. At the beginning of the operation, after the totalizer has been selected by longitudinal movement of slide 3!, through the operation of a mechanism to be described presently. the bars M are moved down and the selected rack bars G are tilted out of engagement with looking bar it and into engagement with pinions it. The bar 39 is now lifted and arms 38' swung to the left, coming into engagement with the ends of the rack bars at various points dependent upon the individual positions of the rack bars and moving the latter to their extreme left positions. The pinions i3, which are in zero position at the start of the operation, are turned counterclockwise by amounts corresponding to the movement or the individual rack bars engaged with them. At the end'of this movement the rack bars 4 are swung up into engagement with the locking bars I. Meanwhile the differential rack bars 2| have been moved idly to the upper limit oi their movement by the segments I8. The totalizer engaging mechanism to be described presently is now brought into operation and shifts the carriages 26' to the left, bringing the gears I4 of pinions I3 into mesh with the teeth The segments I8 are now turned in clockwise direction by amounts dependent upon the setting of keys I I9a, these movements being added on the pinions I3 to thevalues first transferred to the pinions. At the end of the differential movement the carriages 26 are moved to the right, disengaging gears M from teeth 20. The rack bars 4' are then tilted down again into engagement with pinions l3. Resetting rack bars I8 are thereupon moved upward by driving means (not shown) and the sets of teeth ltd on the right hand edge of these rack. bars engage special parts of the pinions E3 to turn said iolnions clockwise into zero position. These movements are transmitted to the rack bars t, which are thus set into new positions corresponding to the total of the amount previously stored in them and the amount added.

The engagement of the totalizers with the differential mechanism, that is, the engagement of the gears it with the teeth ill oi differential rack bars ii, is accomplished by a mechanism fully described in the said Jacob Patent No. 2,029,776. Fig. 12 of this application shows the part of this mechanism at one end of the totalizer groups, the other end being the same, except that it does not include the cam and pitman. At both ends the carriage it is fitted with pins i213 protruding from the portion of the car riage guided in slots 26a. These pins are normally received in notches iota of locking levers I2l pivotally mounted on studs izd on the side walls 3. Each locking lever E26 carries a sliding plate 823 having a groove to re ceive supporting pins 922 projecting from the locking lever til. fl'ach locking lever 122i has an arm idle to which is pivotally connected a link 58, operated, in a manner to be described presently, by the keyboard. By means of the links 55 the locking levers Hi can be raised to transfer the pins 628 from the notches idea to notches its in sliding plates lie. The sliding plates I23 are providedwith slots l2? cooperating with pins its on plates are. The plates I29 are pivoted at their lower ends by studs 536 on two three=armed levers H32. The levers E32 are secured to a shaft i3il' journalled in-the side walls 3. A connecting rod H9 connects the levers I32 with the two-armed levers 533' by means of studs 531i and I38. The said levers E33 are fixed to a shaft l3! journalled in the side walls ii. The downwardly directed arm of each lever I 33 carries a stud 535 with a guiding element I35, which engages in a slot at the end of the corresponding plate W9. A pitman M3, which is pivotally connected to one of the levers I32 by a stud I44 is guided at its opposite end on main shaft 98' and carries an antifriction roller M2 engaging in the cam race Ill of pitman cam I By means of the mechanism above described the plates I29 and the pins I28 are moved horizontally. There is a are selected and pair oi locking levers HI and sliding plates M3 for each group of totalizers, each being operated by the bars I29 in the manner described, when prepared by shifting from the full line position of Fig. 12 to the dotted line position.

The devices for carrying out individual posting operations in an orderly fashion are only described insofar as they are essential to the operations of posting to the account and the contra-account.

If a series of entries is to be carried out on the machine, which consists of the old balance, one or more debits or credits, and the new balonce, after setting up the corresponding amount in the amount setting field 3|, one of the keys I5-l8 for the old balance is pressed, which brings into effect a mutual locking device (not shown), preventing depression'of another key in the bank 5. In addition, the machine releasing keys 5!, id, and iI are locked when the key I5 is depressed, the keys 8, I 8, II are locked when the key is is depressed, the keys 8, 9, H are locked when the key ll is keys 8, S, and iii are locked when the key it is depressed. A blocking of the debit and credit totaliser banks i-d does not occur, because even if one of these keys has been pressed during the entry oi an old balance, a transmission of the amount set to the selected debit or credit totalizer does not occur advancement of the corresponding item counter. By depression of the corresponding unblocked key in bank ii the machine is released for operation and the old balance is entered in the corresponding old balance totalizer E, as well as in the corresponding side (plus or minus) of the balance mechanism I or II. also, the proper columns of several record sheets are selected and printed, as will be described in part herein and more fully in my copending application Serial No. sass-er.

The posting or the debits or credits is carried out by first setting up the amount in the amount setting field, then-pressing one of the debit or credit totalizer keys in the banks Ml, then releasing the machine for operation by pressing the proper key 3-H in the bani: 6. Durin this machine operation the debit or credit item of an ac count is transmitted to the corresponding debit or credit totalizer A-D, as well as to the proper side of the balance mechanism I or II. Also, the corresponding columns of several record sheets printed. Since there is no blocking means between the banks of keys 6-5 and the bank 5, the debit or credit totalizer key which has been pressed becomes inoperative, if a key in the bank 5 has also been pressed, while the depressed key in the bank 5 controls the operation of the machine. In such a case, accordingly, the machine either enters an old balance, a cancellation, or a corrective amount.

If by mistake a key in the debit banks i or 2, as well as a key in credit banks 3 or d has been pressed, the machine will carry out, in a manher to be described presently, a posting operation including, insofar as the debits and credits are concerned, a posting to the account and to the contra-account. In such a case the releasing keys 8-4 I in bank 6 are free for operation.

In order to determine the new balance of an account, which may be positive or negative, it is only necessary to press either of the releasing keys depressed, and the There will follow i2 or 13, whereby the corresponding balance mechanism is reset to zero and the total is printedv in a corresponding column of the record sheet. a detailed description of the mechanical devices for carrying out these opera tions.

The old balance of an account, which customarily precedes a series of entries, is introduced by setting the corresponding amount in the amount setting field 3i and pressing one of the keys lE-ifi, for instance the key [5. Mechanism is provided to block all of the keys of bank 6, except the key corresponding to key i5. For this purpose a slide 38 (Figs. 1 and 2) is mounted adjacent the key bank 5, which is pushed downward by depression of the key l5. A thrust bar 39 connected to slide 38 is provided with two fingers it, which straddle a finger 6! (Fig. 3) of a thrust bar (i2. The thrust bar 62 has a forked end at guided upon a shaft (it and is connected with a slide 35 located beside the key bank 6. This slide has lugs 65a adapted to block pins 46 on keys 3, iii, and M, when moved downward by the depression of key i5, or to block pins 58 of keys 8, it, i i when moved upward by depression of key 1 8. In the case under consideration the keys 2, iii and ii are blocked.

A blocking mechanism 38b, 39b, (lib; (55b (Fig. 1) similar to the one just described is provided between the keys ll and i8 and the keys ii-i i, which blocks the keys e, il when the key ii is pushed, and the keys 8, 9, it when the key it is pushed. This mechanism will not be explained in detail, in view of its similarity to the one just described.

At the same time depression of the key i5 conditions means to efiect the engagement'of the corresponding old balance totalizer, which is to become effective during the machine operation. For this purpose a slide til (Figs. 1 and 4) beside the key bank 5 is moved in clockwise direction by the pin (ii on key l5. This slide iscoupled to a thrust bar it, which bears a pin 59 engaging in a slot El of a bail'EZ. The thrust bar it is yieldingly coupled to the ball 52 by a spring 53, one end of which is attached to the pin 5d and the other to a pin 56 on the bail 52. The ball 52 has an arm 65 to which is connected the link 55 that serves to couple the carriage 26 to the totalizer engaging mechanism.

The mechanism for selecting the individual totalizers within each group is shown particularly in Fig. 13. The keys id-z i and 25-28 represented in this figure control a, differential mecha nism mounted on shaft M9, which need not be described in detail. To a plate 59' differentially controlled by the keys are pivotally attached links Mill-Ede. The opposite ends of these links are connected at 53' to arms 52 of spirally slotted cam members 50' fixed upon shafts 5!. The slots of cams 56 receive pins 58 of collars ll' fixed to shafts 38'. The shafts (16' are thus shifted axially during the machine operation and being fixed to the sliding frames 3!, as seen in Fig. 18, serve to slide the frames 3! for selecting the totalizer to be operated, as previously described.

As shown in my copending application Serial No. 226,467 the machine has a printing mechanism for printing the old balances, debits, credits, and new balances in separate columns of several record sheets. The selection of the old balance column for printing is one of the functions of keys (-22. For this purpose the thrust bar 39 (Figs. 2 and 3) acts upon a bell crank lever 58 rockably mounted upon a shaft El. To this bell aseases crank lever is connected 9. bar 69 having two shoulders 6G and ti, which cooperate with two pins t2 and 83, which are fixed respectively to two toothed levers 5Q and 65 (Fig.5). The thrust bar 89 is controlled by the keys i5, l6, l9, and 2t and a thrust bar 39a. (Fig. 5) similarly controlled by keys ll, i8, 2i, and 22, acts in the same way through a bell crank lever 68a and shouldered bar 59a upon pins t2 and 63. The toothed levers 6d and 65 are rockably mounted respectively upon shafts 66 and 6?. The shafts $6 and 61 are mounted in two side plates 68 of the blocking unit. To the lever 65 is connected, by a pin 69, a, link it, whose lower end is connected at ll to the arm 12 of a bail E3. The bail 73 is rockably supported upon a shaft Hi, which is also mounted in the side walls 68. The ball 73 extends beyond the right-hand side wall 68 and has at its righthand end an arm Mia, to which is secured a pin id. The pin 75 is connected to a link 76, whose other end is articulated to an arm ll of a bell crank lever id. The bell crank lever '58 is rockably supported on a pin 19 secured to a thrust bar 88. The lower forked end of thrust bar 8b is guided upon a pin 229 fixed upon a side plate 85, while its upper end is connected to an arm 328 of a. bail 32?, for a purpose to be described presently. A bent-over end 78a of bell crank lever l8 coacts with a finger SI of a bar 82. A fork 83 of bar 82 is guided upon a rod 84, which is -mounted in the side walls 88 and 85. A notch 86 of bar 82 engages over the upper end of a lever Mt rockably mounted upon a pin 15!. The pin liii is fixed in a bell crank lever Bl, which i rockably mounted upon the casing wall 5% by means of a pin 88. A fork 9d of lever Bl engages over a pin 89 ofea lever 9 l which in each machine operation is rocked first clockwise and then counterclockwise, by driving means not shown. The lower end of lever M6 engages in a recess Hi3 of an upturned lug 7 32 of a slide 739. The clockwise rocking of lever 9|, which swings bell crank lever Bl in counterclockwise direction, also turns the lever M6 in clockwise direction on its pin because the end of lever Hi6 engaging in the notch 86 is held fast by the bar 82. Consequently the lever M8, whose lower end M3 engages in the fork M2, moves the slide 139, with the result that the printing mechanisms are positioned for printing in the old balance columns of all the record sheets, through a mechanism described in my said copending application Serial No. 226,467.

Following the depression of key it, the unblocked releasing key 8 (Fig. 6) is pressed. This key has, in addition to its machine releasing function, the functions of determining whether the balance mechanism is to be operated positively or negatively, and selecting the proper balance mechanism for engagement. For these purposes there is provided beside the key bank 6 a slide 92 (Fig. 6), having oppositely inclined shoulders 92a and 92b for coaction with the respective pins (iii of keys 8 and 9. The slide is moved oppositely by these pins, the pin of key 8 moving it upward. A thrust bar 93 is coupled to a slide 92 and is connected by a pin ed to a bail 95 rockably supported upon a rod 95 mounted between the side walls 58. To an arm 97 of bail 95 is connected a link 98, whose lower end is coupled by a pin 99 to a bail we. The bail tail is rockably mounted on a rod 841 and has fixed to it a. pin ii which engages in a slot m2 of a. rod lbs. The rod W3 is connected to a bell crank lever IB S, which is loosely rockable upon a shaft m5. To the other arm of the lever lid is connected a link we, which is articulated at its opposite end to a lever I08 secured to a shaft I01. This shaft serves for lateral displacement of the balance mechanism, according to whether the latter is to be operated for positive or negative registration of an amount. A lever H23 (Fig. 16) fixed to shaft I01, rotates a plate H04 by means of parts H24, H25, H21 and I I28. The plate H04 is rotatably mounted by pin H30 on rod H3I and controls the movement of rod II3I, caused by the differential mechanism H05, a acting on plate H04. The movement of rod H3I is transmitted through parts H33, i I34 to cause a lateral movement of balance mechanism I from debit to credit position, or in the reverse direction. The balance mechanism consists essentially of adding wheels 339 (Figs. 14, 16 and 17), which are fixed to zero setting wheels 340 and subtracting wheels 34 I. The latter are connected to the adding wheels 339 by pinions 342, 343. The adding and subtracting wheels 339, 340 are freely revoluble upon axles 344, 345. In adding operations the adding wheels 339 engage the rack bars 2|, while in subtracting operations the subtracting wheels 3 engage the rack bars. In zero setting operations the zero setting wheels 340 engagethe Zero setting rack bars I0, so that the amount in the balance mechanism is transmitted through the subtracting wheels 34I to the rack bars 2 i The engagement of the balance mechanism and adding racks 2 I is effected by the following linkage. Upon the bar 98 (Fig. 6) is fixed a pin I09, adapted to act upon an arm H 0 of a toothed sector III. The toothed sector i ii is supported upon a rod I I2 and meshes with a toothed sector H3 rockably mounted upon rod 84. An arm lid of toothed sector H3 stands in contact with the pin 99. The two arms H0 and H4 oi toothed sectors l H and H3 are connected by a spring i W,

which pulls them into contact, respectively, with the pins M9 and 99. A second arm l 65 of toothed sector H3 carries a rod H3 which is coupled to a lever H1 secured to a shaft MB. This shaft serves for coupling the balance mechanism with the difierential members. A lever 4089 (Fig. 1e) fixed on shaft H8 acts upon a three-armed lever l03l, whose arm I092 meshes with a notch 4093 of a crank lever i094 rotatably mounted on a shaft 50%. The crank lever M94 is connected with the plates l09'I/98 by a link i030. The plates i09I/90 are rotatably mounted by pin i039 on a rod M00 and cooperate with an arm H53 fixed on shaft H03. The rod H00 is supported by arms Hts/0'! and, driven by arm H02 which engages plate i098 for downward movement, or pin HOE for upward movement, acts through parts 4508/09 to shift the balance mechanism I in one or the other direction.

One of the functions of the keys 3-H is to re= lease the machine for operation. For this pur-- pose there is mounted beside the key bank 6 a slide I (Fig. 7) having cams I200; to be engaged by the pins 46 of the keys. The slide I23 is connected with a thrust rod I H which bears a pin l 22 over which is engaged one end of a spring 423. The opposite end of the spring is engaged by a hook M4 mounted in the frame of the key bank 6. The thrust rod i2i engages over a pin I25 of a bail i228, which carries a square pin I27 and is rockably mounted upon a shaft I 28. With the square pin 52? cooperates a lever I29 rockably mounted upon shaft 96 and having an arm i30 connected to a link I3I. The link MI is connected to a lever I32, rigidly secured to the releasing shaft i33 which causes the release of till the machine. Hie releasing shaft stands under the pull of a spring (not shown) and swings in clockwise direction when the lever H9 is released by the square pin Hi.

in the key banks i-t, for instance, a key' 20 in the key bank 2. Since this key is a debittotalizer key, the amount is to be negatively entered in the balance mechanism. By pushing a key 26 a blocking device, which need not be described, between the key banks i and 3 becomes efiective, So that in the key bank 5, whose keys 25 are also debit totalizer keys, no key can be pushed. A similar blocking device is arranged between the key banks 3 and d.

The key 28 in the special key bank 2, upon depression, operates through the parts i3'4, I35, I36 (Figs. 1, 1a and 4) to condition the corresponding debit totalizer for engagement with its difierential racks, as has already been described for conditoning the Old Balance totalizer for engagement with its diflerential racks. The bails H46, I41, I43 and H49 (Figs. l and 1a.) for conditioning the engagement of the debits and credits totalizers, correspond with the ball 52.

These bails control mechanisms such as shown in Fig. 12, to shift the totalizer pinions I3 of each group of totalizers into and out of engagement with their corresponding difierential racks or members ill.

The adjusting mechanism for the series of debit and credit totalizers AD corresponds with that heretofore described in connection with the totalizers E-H.

The depression of a key in either of the banks i, 2 also releases a blocking device for the release key 9 of bank 55, while depression of a key in either of banks 3st releases a blocking device for the release key 8. For this purpose there are mounted beside the key banks (1 and 2 slides E135, corresponding to the slide d3 oi the key bank 5. These slides are moved upwardly by the pins 534 of the keys 25 or 26 and each is coupled to a thrust rod 536 (Figs. 1 and 4). Each thrust rod 533 is connected to a link till, whose fork Q33 engages a pin 539 of a bail idll. The ball 840 is rockably mounted upon shaft 11% and has an arm i4l bearing a pin M2 upon which are hung two blocking bars M3 and are. The blocking bar 653 (Fig, 5a) is shifted by operation of a key of the banks 9 and 2; the blocking bar 2'5'5 by a key of r the banks at and d. The blocking bar M3 has a recess M4 open at one side and below this a blocking face M5. This blocking bar is moved downward a short distance by depression of any one of the keys of the banks i and 2. The blocking bar 2'75 is shaped similarly to the blocking bar H43, having a recess 275a and adjoining blocking face 213. The bar 215 is fixed to a pin 234 mounted on a bell crank lever 273, which is roc ably supported on shaft 66. A pin M2 on the upwardly extending arm of bell crank lever 213 enges in the fork 2H of an arm m of a bail Hi. The bail 24i is rockably mounted on shaft 338 and its two upwardly extending arms are respectively engaged by the forked ends of the two thrust bars 240. These thrust bars are connected to bars 239 (Fig. 4) actuated by slides 238 mounted beside the key banks 3 and 4. The slides 238 are moved upwardly on depression of any of the keys in these banks, by the pins 23'! of the keys. This motion shifts the blocking bar 215 upward for a short distance. The bars Elli and M3 are independently movable in vertical direction, due to the pin and slot connections between them, but are both sustained against horizontal movement by the pins 276 and M2.

Coacting with the blocking bars M3 and 275 (Fig. c) is a pin lit, (Fig. 50), which is supportedandpositionedby two links ill and H2 pivotally connected together by it. In any machine operation in which no key has been depressed in any of the rows except 9-5, the pin H3 is positively moved by the actuation of one of the releasing keys 8, 9, along one of two definite paths, which are different for each key, but both of which cross the plane of the blocking faces M5 and 27%. The position of the blocking bars i023 and 2% determines which of the keys 8, 9 can be pushed to release the machine. The link lll is connected to the forwardly extending arm lid of a bell crank lever ltd rockably mounted upon a shaft ltd. The upwardly extending arm of this bell crank lever bears a pin it? engaging in the fork ldll of an arm ltd projecting downward from the ball 95. This ball, as previously described. is rocked either clockwise or counterclockwise by depression of the key 8 or the key 9 (Fig. 6). This rocking movement shifts the pin llti upward or downward for a short distance, through the connections described. The blocking faces M5 and 27d of the blocking bars M3 and Ella are somewhat staggered. In the normal position of these blocking bars the pin H3 is moved upward to the level of recess 275a by depression of the releasing key but is opposed to the blocking face Md. The operation of one of the keys of the banks l and 2 moves the blocking bar M3 downward till its recess M6 is in alignment with the recess 2750:. thus leaving the pin lld free to be moved rearward, in a manner to be described presently. On the other hand, if the pin ill? is moved downward by depression or the releasing key 8, it comes below the blocking face i 35, but is still opposed by the blocking face 2%. Movement upward of the blocking bar 2% by depression of one of the keys of the banks 8 and 3 removes the blocking face 276 from in front of the pin lid. The pin H3 is forced to execute a movement toward the blocking bars M8 and 275 each time either of the releasing keys 8 or Q is operated. For this purpose the bail l26, (Figs. 5a and 5b) which is rocked in clockwise direction (Fig. 'l) by depression of a key of the bank ll, as previously described, has an arm ll'd (Fig. 5a) to which is connected a link lit, the lower end of which is articulated to a bail ll'l rockably mounted upon a shaft lltl. An arm lid of bail ill carries a pawl ltll, which acts upon a pin ldl of a lever its rockably supported on shaft it. The lever i852 has fixed to it a pin ltd which carries a double pawl ltd, lllt, whose arm l8?) acts upon a pin it? of a lever il -.1 rockably mounted on shaft ltl. The upper end of this lever is articulated to the previously mentioned link H2, at the rear end of which the pin W3 is fixed. Through this mechanism the pin W3 is forced to move toward the blocking bars i413 and 275 whenever any key of the bank 6 is pushed. Thus only the key 8 which moves the pin lid downward can be operated when a key of banks 8 or 3 has been set, and only the key 9 which moves the pin H3 upward can be operated when a key of banks l or 2 has been set. Depression of either the key 8 or the key d releases the machine operation by withdrawing the square p n 7 asaaasa (Fig. 7) from the lever lid, in the manner previously described.

The keys it and ll release operations for entries in balance mechanism 11, being coordinated with keys ll and ill for this purpose in the same way as keys 8 and 8 are coordinated with keys l6 and if).

Depression of either key 8 or key 9 efi'ects the engagement of the corresponding side of the balance mechanism with the difierential mechm in the manner previously described. For instance, by pushing the release key 9 the slide 92 (Fig. 6) is pushed in counterclockwise direction and through the parts til, dd, 95, 98, 9553, ldll the pin MM is moved in the slot m2. There is no displacement of the balance mechanism, although it is a debit posting, because the balance mechanism returns to subtraction position after each machine operation. On the other hand, the pin 99 acts upon the arm lid of toothed sector H8, whereby the latter is swung in clockwise direction and moves with it the rod l it. Through the lever lll shaft lid is turned in counterclockwise direction and thereby the balance mechanism is shifted into engagement with the differential members.

For the selection of the proper column of the record sheet the bail ldll (Fig. 5) is provided with an arm ltll, which has fixed to it a pin ldl. The pin ltl projects into a slot left of a pawl n58, which is rockably mounted upon a pin I56 fixed to a lever l5?) rockably supported on a shaft l 'l. Upon pin ltd there is also provided a thrust bar I56 having a slot it? which embraces the pin l5l. The thrust bar ltd has a bent-over arm ltd which coacts with a finger ltd of a bar ltd. A notch it! of bar ltll engages the upper end of a lever PM, which corresponds to the lever i416 and has a similar efiect, but with this difference, that through the parts H62, 7368, E3? the debits column of the record sheet is selected. The bent-over arm ltd coacts at the same time with a finger M52 of a bar ltd having a socket ltd engaging over the top of a lever W9. By the bar ltd, the lever lit, and the parts lll, W8 and lit, the type wheel for the special sign (not shown) is moved into printing position, as disclosed in my aforesaid copending application Serial No. 226,467.

The thrust bar its has a second bent-over arm 2% which coacts with a finger it? on the lower v side of a bar 268. This bar has a notch 25S em gaging the upper end of a lever l l'l rockably mounted on pin 'ldl. The lever H ll acts upon a slide Md to cause the printing mechanism to print in the credit columns of the record sheets, in a manner similar to the other levers of the group. The arm 26% also coacts with a finger ldfia on the lower side of bar ltd, to control the setting of the special type wheel. As previously explained, the bail ltd rocks in clockwise direction for engaging the addition side of the bal-= ance mechanism with the difierential mechanism, and in counterblockwise direction for engaging the subtraction side. correspondingly, the arm 265 is engaged with the finger 2H for credit entries and the arm H58 with finger E59 for debit entries.

When a key in. the special key bank 5 is pressed at the same time as a key in one of the banks ll, the operation of the machine is controlled by the key in the bank 5. Accordingly, the mechanism for selecting the debit or credit column of the record sheets is disabled. For this purpose, the link i553 which has a notch E52 normally engaging pin it! is connected by a pin 153a and a link l53b to the arm 14a of the ball 13. By this linkage rocking of the ball 13 in clockwise direction, which occurs when an key of the bank 5 is pressed, disconnects the link I53 from the pin IN and the rocking of ball M is without effect upon the thrust bar 6.

When the new balance of a bookkeeping op= eration is to be drawn, the key it is pressed. This new balance may be eitherpositive or negative. By depression 01 this key the corresponding side (plus or minus) of balance mechanism I is placed opposite the difierential members and the machine is set for total taking.

The total taking mechanism for the balance mechanism is described in the German Patent 606,799 on page 3, line 78 to page 4, line 42.

The key I2 also acts by its pin l38 (Fig. 9). upon a cam we of a slide I90, whose cam l9l coacts with pin I92 of key It. By this device operation of key l3 appertaining to balance mechanism II is prevented, while conversely by depression of key l3 the key M is locked against depression.

A setting of key l2 also acts to select the proper column of the record sheet. For this purpose a slide I93 (Fig. 10) is mounted beside the key bank '1 so as to be movable in counterclockwise direction by the action of pin its or key it. A nose I94 O11 slide H93 acts upon a lever i95, which has fixed to it an arm its connected to a link I91. The other end of the link is articulated to a lever l98, which is rigidly listed to a shaft I99 (Fig. 11). Upon the shaft 899 there is also fixed a lever too, to which is connected 0. link 2M. The opposite end of this link is connected to a bell crank lever 20? rockably mounted on shaft 66. A pin 2% fixed to lever tilt (Fig. 5) projects into a fork 20E of a bail filth. This bail is rockably mounted upon shaft 659 and extends to the extreme right end of Fig. 5, where its arm 206 is connected to a thrust bar 2t? guided by fork 2B8 upon pin Edit. This pin is lined to the side wall 85. A lateral arm 2MB of thrust bar 20] coacts with a finger tilt of a bar EH2. A recess M3 of the bar 20% engages over the upper end of a lever 2%, which corresponds to the levers 1, M3 and M9 and has a similar effect, only with the difierence that through the parts ltd, 143, its, it selects the new balance column of the record sheet for printing.

By the operation of key it the release of the machine is efiected through parts ltd-its (Figs. 10 and Ill). The shaft tilt has fixed to it a lever 284, which is rocked in clockwise direction by depression of the key it, thereby pulling forward a link 2515, which has a slot lit at its rear end engaging over a pin til on bail 628. Clocin wise rocking of the bail 926 causes the release of the machine, in the manner previously described.

A blocking device (not shown) may be provided to block the keys t-ll when one of the keys it or as is pushed, while depression of the keys 29 or so would set the machine for taking sub-totals and end-totals from the totalizers and would block the keys il -i3.

In contrast to a sequence of operations in which entries are made of an old balance, one or more debits or credits, and the new balance of a single account, a series of entries consisting of an old balance of an account and a contra=- account, debits and credits of the account and the contra-account, and the new balance of the (Bil account and the centre -account are carried out in the following manner;

The entry oi the old balance is Performed in such a booking operation in the some way as described in the preview part of this speciflca= tion, with the single dificrence that the old balance oi the account is first entered in one ma chine operation and then the old balance of the contra-account in another machine operation.

A change in the procedure in posting to an account and a contra-account or an account owner occurs only in the posting of the debits and credits, because in this case in one and the same machine operation both the account and the contra-account of the account owner are to be posted. Consequentl in posting debits and credits there must be pressed one of the keys 25 or 26 and in addition one of the keys 2'! or 28, disposed, respectively, in the adding totalizer key banks i or 2 and 3 or 5.

Drawing a new balance of an account and a contra-account is carried out in the same way as described in the previous part of this speciflcation with reference to drawing the new balance or a single account, with the sole difference that first the new balance of the account is drawn and then the new balance or the contra-account.

For better understanding of the present invention there will be more fully described debit and credit postings in which the account and the contra-account are simultaneously posted in one machine operation.

Operations of the machine in which an ac count and a contra-account are simultaneously posted are set up by pushing both a key in one of the banks l or 2 and a key in one or the banks 3 or t.

Depression of a key 26 or 2t of the key banks l or a causes the selection of the corresponding debit totalizer in the manner previously de scribed, while depression of a key 2'3 or 28 of the key banks 8 or t causes the selection or the corresponding credit totaliaer.

By mechanism to be presently described, the setting of these two keys causes each of the re= leasing keys 8 or to be effective for engaging both balance mechanisms 1 and H, but for on posite operation, that is, one positive and one negative. That is to say, the key 8 sets the batance mechanism i 101 positive operation and the balance mechanism H for negative operation; while the key has the reverse effect. Key it has the same effect as key 8, while key it] has the same effect as key Since the blocking mechanism its, 973 (Fig. do) would prevent releasing of the machine when both debit and credit keys in the banks ll have been set, this blocking mechanism is disabled and another one is brought into play. The switching of the blocln ing mechanisms is performed by the previously mentioned double pawl ltti, which is shifted out of engagement with the pin Bill by the set ting of a key in the banks i or ii and a key in the banks 3 or t. The mechanism for this purpose will be described presently. When the pawl. 685 is moved out of the range of pin tell, the pawl B86 is moved into the range of a pin on a lever 283 rockably mounted on shaft lit. The upper end of lever 283 has fixed to it a pin 28 3 which stands opposite two blocking arms 285 and 286 extending from the respective blocking bars 3 and 2m. In order to free the pin 28 32 the blocking arm ttilmust be moved downward by depression of a pin and the blocking arm 2% must be moved upward in. one of the banks l or 2' depression of a key in one of the banks 8 or 4. use the For switching the double pawl Hi5, arm 886 is connected by a pin Elli to a link 2851, the upper end of which is articulated to an arm at the left end of a ball 2%. At the right end of this bail, near the right-hand side wall til is an arm provided with a fork Z'lt engaging a pin 2?? on a bar 22$. This bar is supported by an arm 22s of a bail 226, rockably mounted on shaft l28. The ball 22% has at its left end an arm engaging a pin 222 fixed to the rearwardly ex= tending arm of a bell crank lever 22!]. This bell crank lever is supported upon a pin 22l projecting from an arm kid of a ball 2H3, integral with ball Mill. The downwardly extending arm of hell crank lever 22s is connected by a link 2G6 and pin 26% with a downwardly extending arm 262 of bail 2M. As previously described the bail Mt is rocked in clockwise direction by depression of a key in either of the key banks l or 2 and bail 526i is rocked in the same direction by depression or a key in either of the key banks 3 or d. The two movements thus imparted to the pin 222 of hell crank lever 22% are sufiicient to bring the pawl 85 below the pin ltl' and to move the pawl R86 down to the level of pin 282.

While the depression of a single key in the banks l-Ll determines which of the releasing keys or a may be operated, the depression of a debit key and a credit key in the banks l-fil leaves both releasing keys is and 9 free for operation. Thus the selection of these keys will be dependent upon the account of the account owner; that is to say, if this account is to be charged the releasing key 9 is pressed, while if it is to be credited the releasing key 3 is pressed.

The mechanism for rendering the releasing keys l3 and t individually capable of coupling both balance mechanisms I and II with the sliderentlal mechanism is as follows:

For selecting the subtraction or addition side of the balance mechanism ll and for coupling the same with the differential mechanism, there are provided mechanisms similar to those for the selection and engagement of the balance mechanism I previously described with reference to Figs. 6 and 5. Referring now to Figs. 8 and 5, there is rockably mounted upon the rod G718 a bell crank lever 26?, the upwardly extending arm of which bears a pin 2% engaging in a slot 239 at the right-hand end of a link The leit= hand and of this link is connected to a bell crank lever 2st rockably mounted upon the shaft use. The other arm of the bell crank lever 255 is con nected by a link 252 to an arm 2E5 fixed to a shaft 253, which serves for selection of the proper side (plus or minus) of the balance mechanism It. This selection is made through mechanism similar to that previously described for the balance mechanism 1. Returning to the bell crank lever 26?, its horizontally extending arm pivotally engages a pin 2% fixed to a bar 2 35. The pin 2% stands over an arm 26E of a toothed sector which is in mesh with a toothed sector 2st rockably mounted upon a rod 25W. The sector 2% is connected by a link 2258 to an arm 259 rigidly fastened on shaft its. This shaft effects the engagement of the balance mechanism 11 with the difierential members, through mechanism similar to that previously described with reference to the balance mechanism 1. The sector 256 has a rearwardly extending arm 255 connected by a spring 252 to the arm 2M of sector 2%. The arm 255 is held by the spring against a pin fixed to the bar 2115. Movement of the bar either up or down will engage the balance mechanism II with the dlfierential members, through the link r58. Downward movement of the bar 268 will select the addition side of the balance mechanism II, by pulling rod 25a to the right, while upward movement of the bar 245 will simply cause the pin 268 to move to the left in slot 2%, leaving the balance mechanism H in position for engagement of the subtraction side.

For the joint engagement of the balance mechanism II and balance mechanism I the bar 265 is coupled to the bar 98 which controls the balance mechanism I and is controlled by the keys 8 and 9. For this purpose there is suspended from the pin we on .bar 99 a link 23%, at the lower end of which is a pin 235. The pin 233 on the bar 2415 has suspended from it a latch 232 whose lower forked end 233 stands opposite the pin 23-5. This latch is connected by a link 28E to an arm sec of a bail 228 rockably mounted upon a rod 229. The other arm 22? of the ball is connected to the bar 22%, to which the movements of the pin 222 on bell crank lever 22d are imparted through bail 2241. The combined movements of pin 222 caused by depression of a key in rows l or 2 and a key in rows 3 or G is sufficient to bring the latch fork 23 into engage ment with the pin with the result that the mechanism for controlling th balance mechanism II is operated simultaneously with that for controlling the balance mechanism 1'. It will be noted that these controlling mechanisms are so related that when the addition side of the balance mechanism I is selected the subtraction side of the balance mechanism II is selected, and vice versa.

In certain cases the plus or minus side of the balance mechanism 11 and its engagement with the difierential members can be performed directly by pressing one of the keys it or ill, whose pins lt act upon a slide 2% coupled by a bar 266 and bell crank lever 2'65 with the bar 285.

By pressing the releasing key t the printing mechanisms are set to print in the credits column of the record sheets for the account in the manner previously described. As described in my copending application Serial No. 226,467 the printing mechanism prints in the debits column of the contra-account and the credits column of the account simultaneously, or in the credits column of the contra-account and the debits column of the account. The release or the machine operation by press mg the releasing key 8 takes place through the parts 66, Hit, i211, i325 (Fig. '7), which turn the bail lid in clockwise direction; whereby its arm W5 acts upon the link lit (Figs. 5 and 7). Through the parts ill, H9, 1186, H33, H85, H36 the lever 283 can be swung in clockwise direction, because, as previously described, the arms 285 and 286 of locking bars Mid and 275 have been moved out of the range of pins 28% by the setting of the debit and credit keys. Simultaneously the square pin l2'l (Figs. 5 and 7) releases the lever lZQ, so that under the pull of a spring (not shown) the releasing shaft lSt is rocked in clockwise direction.

If several postings are to be made to the same account totalizer in succession, it is desirable to retain the set totalizer keys 25-28 in their depressed position. For this purpose repeat keys 32 (Figs. 1 and la) are provided, which prevent the release of the depressed setting members 25-28 at the end of a machine operation. Since the setting members 25-28 may also remain depressed position during old balance machine operations and new balance machine operations, precautions are taken to prevent the selection and engagement of the corresponding debit or credit totalizer in these operations, as well as the selection of the debit and credit columns of the record sheets for printing, the setting of the special sign for printing, and the advancement of the corresponding item counters. The mechanisms for suppressing the control of the debit and credit keys over the selection of the columns of the record sheets to be printed upon and the setting of the special sign for printing have already been explained. The mechanism for controlling the advancement of the item counter forms no part of the present invention.

In drawing a sub-total or an end-total by means of keys 29 or 30, there may always be depressed only one of the keys I 4-28, particularly one of the keys 25-28. For this purpose, a device is provided which prevents the release of the machine when more than one of these keys is depressed. As previously described, a pin 222 (Fig. 5a) of the bell crank lever 220 drops for a certain distance upon depression of a key 26. Upon the pin 222 is hung a bar 281, the lower end of which is in the form of a fork 288. To this fork 288 is fixed a pin 289 which coacts with two fingers 290 and 29I and an intermediate notch 292 of a locking bar 293. The locking bar 293 is supported upon an arm 294 of a bail 295, which is under the control of key bank 5 (keys I4-24) through a bar 296 (Figs. 4 and 5a). The bail is rockably mounted upon rod 96. The bar 293 is connected to an arm 291 mounted by its hub 298 upon a shaft 299. By pressing a key 29 or 30 (Fig. 7), through the parts I20, I2I, I25, I26, E15, I13, I17 (Figs. 5a and 51)), an arm 300 riveted to the bail H1 is swung in clockwise direction. To the arm 300 is connected a bar 30I which bears on its upper end a fork 302. With the fork 302 coact a pin 303 riveted to a bell crank lever 305. The latter is rockably mounted upon shaft 299 and bears a pin 305 which engages in the fork 283 of bar 287. Since this blocking mechanism is only to be eifective on operations controlled by the keys 29, 30, provision is made for disabling it during the other operations of the machine. The fork 302 has an opening 302a which normally allows the pin 303 to slip out of the fork as the latter moves downward when the bail ill is rocked in clockwise direction, as it is on each operation of a machine releasing key. To couple the fork 392 with the pin 303 there is provided on the bar 30l a pin 330 connected by a link 33H to a bail 327i rockably mounted upon shaft I92. Th bail 323 has at its middle an arm 323 provided with a pin 325 engaging a fork 333 of a bell crank lever 323 rockably mounted on shaft 299. A horizontally extending arm of this bell crank lever straddles a pin 323 mounted on one arm of a bail 332 rockably mounted on shaft 37. A link 322 connects the pin 323 to one arm of a bell crank lever 32f rockably mounted on shaft 90. The other arm of this bell crank lever is connected by a link 329 (Figs. 5 and 5a), similar to the link 93, to a slide 3I9 (Fig. 1) moved upward by either of the keys 29 or 30. This motion, through the mechanism described, rock the bar 39I to engage the overhanging lip of fork 302 over the pin 303, so that the latter will be moved downward by the rocking of bail II'I. By means of the described mechanism, when-a key 29 or 30 has been punched, the pin 289, lowered by depression of a key 26 or 28, is pressed into the notch 292 of bar 293.

If both a key 26 and a key 28 are in their depressed positions, the pin 222 in bell crank lever 220 (Fig. 5) as previously described, is lowered by two partial movements, whereby through bar 293 the pin 289 i brought in front of the finger 2?. Consequently neither the release key 29 nor the release key 30 can be pressed. If only a key 26 is depressed, or if only a key 28 is depressed, the pin 289 is brought by the single partial movement opposite notch 292, permitting depression of key 29 or key 30. If only a key in bank 5 is depressed bar 293 is raised to bring notch 292 opposite pin 289, but if a key 26, or a key 28, or both are depressed, the pin 289 moves down opposite finger 29I and keys 29 and 30 are blocked. The effect is the same if a key of the bank 5 is depressed si multaneously with a key 26 or a, key 28.

The pawl I (Fig. 5) which acts upon the releasing mechanism in the registration of debits and credits is brought out of the range of pin I8I, in registering old balances, in drawing new balances, and in drawing sub-totals or end-totals. For this purpose there is fixed to the pawl I80 a p n 3I0 which extends through slots 309 in each of three bars 306, 30?, 308. The bar 306 is pivoted to an arm 33l at the left end of bail 333, which, as previously described, is rocked by operation of either of the keys 29 or 33. The bar 301 is connected to the pin 203 of hell crank lever 202, which, as previously described, is rocked by either of the keys t2 or I3. The bar 308 is pivotally connected to an arm 334 at the left end of a bail 335 rockably mounted on shaft 971. A fork 339 at the right end of this bail engages pin 63, which is raised each time a key of the bank 3 is operated, through mechanism previously described. Thus in each of these three kinds of operations the pawl I30 is disengaged and the blocking mechanism associated with it is made inoperative.

The blocking assembly is inserted in the bookkeeping machine, which is mounted between the casing walls 596 of the machine frame. The arrangement is such that the blocking assembly is inserted beside the groups of totalizers oi the bookkeeping machine and directly behind the setting field consisting of the key banks I-Ii.

I claim:

1. In a bookkeeping machine, a pair of pre liminary setting members, a pair of secondary setting members, a feeler, impelling means operated differently by the respectve secondary setting members to impel said feeler along different paths of movement, blocking means normally blockin both of said paths of movement and means whereby said blocking means are shifted by the respective preliminary setting members to unblock said paths of movement of said feeler alternatively.

2. In a bookkeeping machine, a pair of preliminary setting members, a pair of secondary setting members, a feeler, impelling means operated difierently by the respective secondary setting members to impel said feeler along different paths of movement, blocking means normally blocking both of said paths of movement, means whereby said blocking means are shifted by the respective preliminary setting members to unblock said paths of movement of said feeler alternatively, a second feeler, impelling means operated by either of said secondary setting members to impel said second feeler along a certain path, a second blocking means normally blocking said path, means whereby the joint operation of both of said preliminary setting members 

